Eick hammill



2 Sheets-Sheet 1.

Patented Sept. 22

INVENTEI'R flan O. H. GARY.

ROTARY ENGINE 0R PUMP.

(No Modl.)

I v m I m T v :JHQI .LPNI M WITNESSES:

' (No Model.) I 2 Sheets-Sheet 2.

C. H. CARY;

ROTARY ENGINE OR PUMP. No. 326,543. Patented $ept.- 22, 1885.

PIE- 5.

FIE,

WITNESSES: INVENTEIR! flmf UNITED STATES PATENT OFFICE.

CHARLES H. CARY, OF BRISTOL, R. I., ASSIGNOR OF THREE-FOURTHS TO RUSSELL D. BULLOCK, WILLIAM T. C. W ARDWELL, SAMUEL P. COLT, PAT- BICK HAMMILL, AND ELIPHALET HORTON, ALL OF SAME PLACE.

ROTARY ENGINE OR PUMP.

SPECIFICATION forming part of Letters Patent No. 326,543, dated September .22, 1885.

Applicati: n filed December 26, 1894.

To aZZ whom it may concern.-

Be it known that I, CHARLES H. CARY, of Bristol, in the county of Bristol and State of Rhode Island, have invented an Improvement in Rotary Engines or Pumps, of which the following is a specification.

My invention consists in the combination of an outer case provided with opposite concaved abutments with a revolving head having ra- IO dial chambers provided with reciprocating pistons, a fixed eccentric wrist-pin, and connecting-rods extending from the wrist-pin to the back of each of the pistons.

It also consists in the combination of the outer case provided with opposite concave abutments with the revolving head having radial chambers and the reciprocating pistons curved on their front surface to fit the concaved front surface of one of the abutments during the revolution of the chambered head,

whereby the revolution of the head and pistons Within the outer case will be practically effected without clearance waste.

Figure 1 is a transverse vertical section of 5 my improved rotary engine or puinp. Fig. 2 is an axial vertical section of the same. Fig. 3 is a horizontal section taken in the line as x of Fig. 1. Figs. 4 and 5 are vertical sections of a modification of my invention.

In the accompanying drawings, A is the outer case, preferably made in cylindrical form, and to which are bolted the removable heads B B. The head B is provided with a central hub, a, adapted to form a bearing for the shaft C, and the head B is provided with an inwardly-directed concentric hub, b, and also with an eccentrically-arranged hub, c, and with the eccentric Wrist-pin c. The cylindrical chambered head D is securely keyed 40 to the end of the shaft C by means of the inwardly-projecting hub 61 of the head, and the circumferentially-arranged piston-chambers e e e of the head Dextend radially from the periphery of the head to the central chambered 5 portion, 6, of the same.

\Vithin the radial chambers e e e are placed the closely-fitting pistons E E E, recessed at the back to receive the outer ends of the conneoting-rods f, which are pivoted to the pis- (N0 model.)

tons by means of the connectingpins g. The inner ends of the connecting-rods f ff are held upon the eccentric wrist-pin c.

The chambered head D at the opposite side from the hub dis made to have a bearing upon the hub b of the head B.

The case A is provided with an inlet, h, and an outlet, 11, and with the curved passages or chambers j and is, the opposite ends of which are formed by the opposite abutments, F F, the cylindrically-curved face Z of which is made to closely fit the periphery of the head D, and is made to slightly exceed one-sixth of the circumference of the cylinder D, the distance across the chambers e e e in the line of the. circumference of the head being each preferably made equal to sixty degrees.

Whenever steam or water under pressure is admitted to the chamber or passage j through the inlet h, the pressure of the steam or water upon the curved face of the upper piston, E, operating obliquely against the eccentric fixed wrist-pin c by means of its connecting-rod f, will cause the head D to revolve in the direction of the arrow in Fig. 1, the steam or water, upon the revolution of the head and the consequent inward movement of the piston, passing off through the outlet 2', the pistons E, which are cylindrically curved on their faces at to fit the curved face of the abutment F, being forced, by means of the eccentric position of the wristpin 0, into contact with the concave face of the abutment F on their upward movement. The head D is thus caused to revolve under the pressure of the steam or water without clearance waste of the water or steam, which is a great desideratum in pressure-motor engines.

A modification of my invention is shown in Figs. et-and 5, in which the cylindrical head D is provided with four piston-chambers, e, the opposite abutments, F F, being made slightly 0 wider on their faces than one-eighth of the circumference of the head D, the distance across the chambers e in the line of the circumference of the head being each made equal to forty-five degrees.

The shaft 0 is made continuous through the head D, as shown in Fig. 5, and over the shaft 0, and secured by pin or otherwise to the head B, is placed the gear n. The shafts 0 0 00, I passing'through the inwardly-projecting portion 1) of the head D, are provided at their inner ends with the cranks g, from which connection is made to the pistons E by means of the connecting-rods f. Upon the outer ends of the shafts 0 are secured the gears 0, made equal in size to the stationarily-held gear n, and engaging with the same, so that the reciprocating movement of the pistons will cause a continuous rotary movement of the head, the cylindrical curvature of the face of the pistons causing the head and pistons to revolve between the cylindrieally-concaved abutments F F without clearance waste of water or steam.

\Vhen used as a pump, rotary movement is to be imparted to the head 1), the fluid to be raised being drawn through the passage 13 and forced out at the opening It.

OHARLES H. CARY.

\Vitnesses:

CHARLES F. SOHMELZ, SOORATES SoHoLFIELD. 

